Stone with inclusion of Tourmaline from Madagascar

Weight 1.1 kg
Weight 1100 gr. 1.1 kg
Size max 12 cm 120x90x65 mm
Reference 211106466
Mineral group of minerals Tourmaline
Category Decoration stones
Group Free forms
Country Country Madagascar Madagascar
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Formula NaFe2+3 Al6 ((OH)4 (BO3)3 Si6O18)] TOURMALINE
O Oxygen Other no metal 40%
Si Silicon Metalloids 32%
B Boron Metalloids 10%
Al Aluminum Poor metal 7%
Fe Iron Transition metal 6%
Na Sodium Alkali metal 1%
Mg Magnesium Alkaline earth metal 1%
Li Lithium Alkali metal 1%
K Potassium Alkali metal 1%
H Hydrogen Other no metal 1%
Tourmaline is a complex mineral, a member of the silicate group, more precisely cyclosilicates. It is characterized by a wide variety of colors, ranging from black to green, pink to red, blue to brown, and even colorless, which is due to its varied chemical composition and the presence of impurities. Tourmaline has a hardness of 7 to 7.5 on the Mohs scale, making it strong enough to be used in jewelry. It has uneven breakage, a vitreous luster, and a specific gravity between 2.82 and 3.32. A remarkable characteristic of tourmaline is its pyroelectricity: when heated, it acquires an electrical charge, which can attract dust particles.

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Once the package is supported by the postal service, delivery times are those announced by the Post (letter followed or Colissimo followed). Parcel shipping from France.

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Our refund and return policy lasts 14 days. You can read the details on the "return and delivery" page.

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